URs come from Waze only with the coordinates (lat + lon) as they appear on WME. In order to localize them in the Country->State->City geo structure I'm using a GIS software loaded with GADM (http://www.gadm.org) shapefiles. Although GADM files are in general good, they mail be inaccurate in some places. That's what seems to be happening in your area.

In order to fix it we need to find a more precise shapefile - and that's the point I need your help. In some countries government agency publish official shapefiles with more accurate borders. If you can point me where o get I'll be glad to load them on the server to better localize map issues in your area.